/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#import "config.h"

#import "SharedTimer.h"

#include <Foundation/Foundation.h>

#include <wtf/Assertions.h>

@class PowerNotifier;

namespace WebCore {

static PowerNotifier *powerNotifier;

static CFRunLoopTimerRef sharedTimer;

static void (*sharedTimerFiredFunction)();

static void timerFired(CFRunLoopTimerRef, void*);

}

@interface PowerNotifier : NSObject

@end

@implementation PowerNotifier

- (id)init

{

    self = [super init];

    if (self)

        [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self

                                                               selector:@selector(didWake:)

                                                                   name:NSWorkspaceDidWakeNotification 

                                                                 object:nil];

    return self;

}

- (void)didWake:(NSNotification *)notification

{

    if (WebCore::sharedTimer) {

        WebCore::stopSharedTimer();

        WebCore::timerFired(0, 0);

    }

}

@end

namespace WebCore {

void setSharedTimerFiredFunction(void (*f)())

{

    ASSERT(!sharedTimerFiredFunction || sharedTimerFiredFunction == f);

    sharedTimerFiredFunction = f;

}

static void timerFired(CFRunLoopTimerRef, void*)

{

    // FIXME: We can remove this global catch-all if we fix <rdar://problem/5299018>.

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    sharedTimerFiredFunction();

    [pool drain];

}

void setSharedTimerFireTime(double fireTime)

{

    ASSERT(sharedTimerFiredFunction);

    if (sharedTimer) {

        CFRunLoopTimerInvalidate(sharedTimer);

        CFRelease(sharedTimer);

    }

    CFAbsoluteTime fireDate = fireTime - kCFAbsoluteTimeIntervalSince1970;

    sharedTimer = CFRunLoopTimerCreate(0, fireDate, 0, 0, 0, timerFired, 0);

    CFRunLoopAddTimer(CFRunLoopGetCurrent(), sharedTimer, kCFRunLoopCommonModes);

    if (!powerNotifier) {

        powerNotifier = [[PowerNotifier alloc] init];

        CFRetain(powerNotifier);

        [powerNotifier release];

    }

}

void stopSharedTimer()

{

    if (sharedTimer) {

        CFRunLoopTimerInvalidate(sharedTimer);

        CFRelease(sharedTimer);

        sharedTimer = 0;

    }

}

}